Typographic casting machine



Y April 20, 1926.

M. C. INDAHL TYPOGRAPHIC CASTING MACHINE F i1ed Dec. l4. 1923 2 Sheets-Sheet l April 20,1926. n n

M. C. INDAHL TYPOGRAPHIC CASTING `IAGHQIIIIB Filed Dee. 4, 1923 esmas-sheet a Patented ipr. 2G, N325.

Lthl

unirse Asirai'es Perser orrlcs.

MAURITZ C. INDAHL, F PHILADELPHIA, EENNSYLVANA, ASSIGNOR TQ LANSTON MONGTYPE MACHINE GOMANY, O-F PHILADELPHIA, PENNSYLVANIA, A CORPORA- TION OF VIRGINIA.

TYPOGRAPHC CASTING MACHINE.

Application lled December 4, 1,923.

To @ZZ zo/2.0771. il: 1710.3/ concern:

Serial No. 678,544.

Fig. 9 is a perspective. view of the plug -le it known that L .ldimn'rz C. Inuit-1L) a employed in producing the vent, and

citizen of the United States. and a resident of Philadelphia. county of Philadelphia. itate of Pennsylvania. have' invented certain new and useful improvements in Typol 'aphic Casting; h'lachines; and l do h .by declare the following to be a full, clear, and eYactdescription of the same, reference bcf. b had to the accompanying drawings, forming part of this specification, and to the characters of reference marked thereon.

rl`his invention relates to typographie casting machines and has for its principal object the construction of mold mechanism for the product-ion of typographie elements particulai'ly in the form of fused strip. and. as illusn trated. fused strip of the I-shaped or railshaj'ied kind. lts objects furthermore 1nclude a nozzle structure having' a plurality of :inlet branches: and also include a nozzle structure with an inlet passage and pro vided with a ventl opening of relativelysmall size through which air in the mold eayity is adapted to be discharged by the molten metal injected into the mold cavity. Other objects will be hereinafter pointed out or will otherwise appear in connection with the following` description of the particularembodiment of the invention which is shown in the :ic-companyinggl drawings in which,

Fig. l is a plan view of a mold constructed in accordance with the invention.

Fig. 2 is a front elevation thereof.

Fig. 3 is an end elevation, parts being lguolienaway to shou7 in section the friction plunger.

F Il vertical section on approximate-ly line iw-4c of Fig. l., and showingthe melting` pot and nozzle, and in a diagram` matic form the pump mechanism.

Fig: 5 is a `vertical cross section on approxiinately line 5--5 of Fig. l.

Fig'. G is an enlarged section showing the mold cavity and nozzle, the direction of flow of metal in the mold cavity being illustrated by dotted arrows.

Fig. 7 is a plan view of the nozzle.

Fig. El is a vertical section through lthe rent of the nozzle.

`product is produced. ed to operate .in conjunction withv the mold Fig. l0 is aperspective view of the nozzle. The mold illustrated is adapted to pron duce strip material of a form capable of being;` employed in a multigraph or like ina chine for printing` purposes. The cross'seetion of this strip is generally I-shaped or rail-shaped`7 and the strip'may be conveniently termed'railftypestrip material. The

mold employs as its operating' (principle the,

fusionof successive casts suchas is set forth` Lfor example, in United lStates Letters Patent No. 1,222,415, dated April io, i917. n is to be used connection with ya suitable cast- :ingv machine in which .a pump mechanism injects molten type metal or the like into the nioldcavity through `a nozzle; the noz- .zle beingretraeted after each cast; one end of thiscavity is elosedbythe rear face of the section previously cast, and the opposite enc is formed by the end of the mold blade, which, after the metal has been injected into the. mold cavity and cooled into a solid therein, pushes said section which has been fused .to the previous section, in order yto eject from the moldthe finished cast strip; after the ejection bythe mold blade. the latter is kretracted to form a mold cavity, and the process is repeated, it being understood that the 'timing of the various parts ofthe machine, including` movements of the pump, the nozzle and the mold blade, is such as to work harmoniously to the end that a suitable A machine constructillustrated may be similarto that basically shown and describedin United States LettersPate-nt N0.G25.998, May 30. 1899.

The mold illustrated comprises a base member secured to and supported on the machine frame 1l. `This base member has a. flat .central ybase portion l2 Aand two upstanding .longitudinal portions land 14 forming a channel between them. The machine base llris provided with an opening,l l5, and the base l2 of the channel-shaped base member'is also provided with an open-y ing-l@ in registry lwith the opening l5 of tesionline freine these Oree'eeelbeiee fer the purpose of allowingthe nozzle, to be described later, to seat upon the nozzle plate 1T located within the channel of the base member and provided with a conical aperture 1S in registry with the holes 15 and 16, the aperture 18 forming a conical seat for the. nozzle. The nozzle plate is removable from the base plate and is `supported thereon within the channel therein. Above the nozzle plate 17 are the front and rear type blocks 19 and 20, their proximate faces being separated to accommodate between them the mold blade 21. In the ferm shown, 'these proximate faces of the type blocks are rabbeted so that when they are in posit-ion the space between them is of a cross section corresponding with that of the rail-type strip material desired to be produced. The mold blade is of course of a similar cross section and has a sliding lit between the proximate faces of the type blocks. T he type blocks, the nozzle plate and the base member are screwed together by .screws 22 extending' from below and shown in dotted lines in several of the ligures. These screws extend through holes in the base member 12 and the nozzle plate 17 and screw into the type blocks, the holes being slightly larger than the screws .so that the tyge blocks may be adjusted laterally relatively to each other to produce a proper sliding lit of the mold blade. This adjustment is accoi'nplished by the plungers 23, shown in dotted lines in Fig. 1, which may be moved by turning their screwheads 2i screwthreaded in the upstanding portion 13 of the base member. The ends of the plungers are in the horizontalpplane of the type blocls 19 and 20, and it. is obvious that by turning the screws 2l, the type block 19 may be adjustably moved with relation to the type block 20. The nozzle plate 17 and type blocks 19 and 2O are of approximately the same length as the mold base, and the type blocl-ts are of a height corresponding` with the height of the body of the material to be produced.

Located upon the type blocksand in the channel of the base member are the front and rear matrix blocks 25 and 26 respectively. The v are secured by screws 25 extending upwardly through the base 12, the nozzle plate 1T and the type blocks 19. The matrixblocls are provided above the nozzle seat 1S in their meeting faces with a cut-eut portion to produce a matrix well 27 in which a matrix 28 is adapted to be positio-ned and guider. The blocks are also provided centrally with upstanding lugs 29 and 3() undercut so to cooperate with the hook portions of the clamp S1, this clamp beine.,` provided with a screw 32 extending verti cally through the clamp with its end in contact with the upper surface of the matrix. When the screw 3211s manually operated,

the matrix 28 may be forced under pressure against the two type blocks which it spans directly above the nozzle opening. lt is to be readily understood however that this matrix may, if desired, be moved up and down, the walls of the well 27 serving as a guide therefor, if it is desired to produce a product having cast, thereon a border or design requiring the movement of the matrix.

rllhe moving of the matrix may be accomplished in any well-known fashion such as is shown, for example, in United States Letters Patent No. 1,465,27 2, dated August 21, 1923. The matrix blocks 25 and'26 abut along their meeting surfaces except where the well 27 has been provided and where they are cut away `to accommodate the mold blade carrier. They are fastened together by means ofthe screws 33 and Set, the former screw passes through the' lugs 35 on the bottom of the matrix blocks 25 and 26 and the screw Se passes through lugs 36 on the top of the matrix blocks. Suitable separating plates 36 may be provided between the lugs so as to separate the blocks a sufficient amount to provide between them a sliding tit for the mold blade carrier 37. This carrier is supported onthe shelf 38 screwed to the matrix block 25 by screws 39, and on the lower plate 36. The upper surface of the blade carrier 3T is guided by the shelf 49, fastened by screws 41 to the block 25, and by the upper plate 36. The mold blade carrier 37 is provided with a hole Ll2 into which the usual operating mechanism 'for the mold blade is adapted to project and tle rear matrix block 26 is suitably cut away to provide forthis mechanism at any position thereof. The mold blade carrier is also provided with a slot t3 into which projects a ystop L11/l fastened by screws 45 to the end of the matrix block 25, this stop being l'n'ovided-to determine the position of the mold blade at the forward end of its stroke at which position the rearward end of the slot 43 comes against the stop 44. T he mold blade carrier 37 is cut away at its forward lower corner and a square aperture is provided between the hole l2 and this cut away portion, said aperture extending into said portion and being of such dimension as to accommodate lug e6 provided on the rear end of the mold blade 21 and extending upwardly therefrom, the blade 21 extending into and forward of said cut away corner of the holder. The blade and holder may be readily assembled with the lug 16 `in positionto enter the square aperture. lllhen assembled, the walls of the square aperture will transmit reciprocating inotion from the mold blade holder El? to the mold blade 21. The mold blade 21 is shaped of course to correspond with the cross section of the material to be produced and in this particular case is, as shown, ofrail-shaped cross section. It is to he observed that the mold blade holder Si' and the lue; 4G oit the mold blade are guided by the matrix blocks 25 and 2G, which blocks also position and guide the matrix.

'ihe mold is cooled by a system o'lE waterways which extend through the base olf l and through the nozzle plate, type the moi'L blocks and matrix blo-che in such a way as to canse cooling' water to flow in proximity to the casting' cavity. Entrance and exit ot' lthe water is at the points S and il@ rer'spectively. These Aentrance, and exit ports repfster with Similar ports iu the base 'll o'ii the machine in the usual n'ianner so that when a mold is secured 'to the base rol" the machine, as by screws 50, the portC4 -t8 and will be positioned and bound againstthe machine base so that water may be caused. to flow, without leakage between the mold and the machine.

rl`he mold base is provided with a friction mechanism comprising a channel block 5l. screwed to the end of the mold base by screws lil'ithin the channel ol' this block is an abutment blocl 53 secured to the block 5l by screws 5ft, the forward tace of this abutment beine' shaped to Contact with the rear face ot' the strip material as it issues from the mold under ,he ejectine' action ot the mold blade. ln the form shown, the liront 'face 53 of theblock 53 is shaped to Contact with the upper and lower shelves ot the rail-shaped product. The front portion et the block 5l is provided with a bore 1to1' the accon'unfxlation ot the plunger 55, which is hollow for the reception ot Vthe coil spring' one end ot which exerts precsure on the plunger to torce it rearwardly toward the abuti rent 53, and the` other end ot which is in contact with the screw plug,` screwthreaded into the block 5l. By screwing' the 'plug 57 one way or the other, he tension ot the. spring" may be varied and the torce with which the plunger 55 is pressed against the liront tace et the strip material may be thereby regulated. The rear wall 58 ot the plunger 55 is shaped so as to contact with the tront-k face' of the strip material being; produced. lin the form shown this 'tace 5S is formed similarly to the 'lince 53 ot the abutment block 53. The plunger is also provided with a horizontally rai-:tendine lug; which extends under the base ot the material beingr produced and is adapted to Contact with the block 53 in case there no strip material between the plunger and the abutment. The abutment and the lua' 59 therefore act to form a stop to ,'n'event undue movement of the plunger.

lt has been 'lound desirable to employ a nozzle olf novel construction in connection with a railtype mold, such mold having a relatively long streifte compared with the height ot the product inoducedd- .nother words, the height being` less than usual, .the

length 01' stroke may be longer than usual in order that approximately the same capacity of pump operation may be employed, althougg'h the ordinary nozzle, such as shown in Patent 1,222,415, may be employed with. a short `stroke operation. It is desirable, when longer strokes are employed and particularly when the casting` is performed at high speed, to employ a special nozzle which is so constructed that proper tusion is ob tained for the joiningv together ol' the sections of the aroduct and at the san-'ie time a quiclr filling of the mold is accomplished. This nozzle 60, as shown, is provided with a central bore 6l which leads from the lower end G2 of the nozzle which is exteriorly screwthreaded, to a point in proximity to the mold cavity. Branch conduits 63 and 64 connect the upper end of the nozzle with the conduit 6l. The nozzle, is, as usual in the form of a truncated cone near its upper end, the conical walls 65 of which seat against the conical seat 18 in the nozzle plate. At the upper end of the nozzle above the conical portion 65 is a horizontal flat area 66 through which the inlets oit the conduits G3 and 64 discharge directly into the mold cavity -formed by the type blocks 19 and 20, the matrix 28, the mold blade 21 and the rear end wall of the material previously cast. The branches 63 and 64 extend angularly from the central bore 6l andthe angles are so chosen that the metal issuing from the channel 63 willwash directly against the rear -wall et .the previously east section, while the angle of the branch G4- is vsuch as to direct the metal flowing through it into the rearmost portions of the cavity. In order that the branches may be positioned correctly, the nozzle end G2 is screwthreaded into the pump body-67 and is, when properly positioned, locked by the lock nut 68 in an obvious manner. The pump body 67 is oft course provided with a bore or channel, one end. of which communicates with the bore 61 in the nozzle and the other end of which connects with the pump mechanism 69 diagrammatically illustrated in Fig. 4t. The 'flat upper end 66 ot the nozzle which is provided with the'inlets G3 and 64- is also provided with a vent outlet port 70 which extends downwardly and singularly through the nozzle to a point 7l exterior-ly of the nozzle and below the conical portion 65 thereof. This'vent 'TO is preferably formed, as shown particularly in Figs. S and 9, by boring a circular hole and plugging the upper end thereof by a plug 7 to tit the hole but one side et whiclrhas been flattened at 73 9) so that when the plug is placed in the hole, there remains a minute segmental aperture.

lt will be observed, particularly trom an inspection otlligu, that a stream ot metal 2 which is cylindrical injected into the mold cavity through the bore 6l of the nozzle is split up by the branch bores G3 and 64 so that part of the metal, that. passing through the branch 63, is directed to wash up against the wall of the previously cast product in order to cause fusion between the previously cast product and that portion being cast in the mold cavity. This metal may follow the direction shown by the dotted arrows in Fig. 6. The other branch conduit 6st leads the metal angularly from the bore 61 and directs it to the rear end of the mold cavity, as shown also by dotted arrows. The metal which comes into Contact with the walls of the mold will of course quickly solidify and that portion which last solidiiies will be in proximity to the nozzle itself, which, of course, is at all times hot enough so that the metal will not freeze in its passages. It is of course understood that the nozzle is moved up and down in proper timing relation to the other movements of injectingl metal into the mold and ejecting the product therefrom and that when the nozzle is in its down position, it gains heat from the metal pot Til, a fragmentary showing of which is in Fig. 4l, and that when the nozzle has seated against the mold it loses heat to the mold. y he nozzle passages for the injection of metal are necessarily of suflicient size and` capacity that the met-al does not solidify or freeze in said passages during the time that the nozzle is in contact with the mold.

rlhe vent passage in the nozzle is located as to its mold cavity end, between the inlet fan-shaped conduits 63 and 64 and ata point where the metal in the mold cavity solidifies last. lith such location of the vent coupled with the proper angular positioning of the inlet branches 63 and 64, air which may be in the cavity is driven in such manner as is shown by the arrows in Fig. 6, so that it is forced out through the vent 70 and discharges exteriorly of the nozzle at the point v 7l from which it emerges under the hydraulic pressure exerted by the pump. It may be that in addition to air, after the air has been expelled, some metal will escape through the vent 70; if so this metal is discharged in such a manner that it drops back into the pot 74. The size of the opening 70 is relatively very small and may be termed minute, although its actual size may vary, depending upon the quality and composition of the metal used, upon the temperature of the metal, its fluidity and other factors. In general however the vent may be described as relatively very small or minute, its size being such that air will readily escape and possibly some metal also, provided the pump pressure is on and the metal is still relatively Huid; but the vent must be so small that even with some hydraulic pressure the vent 70 will freeze before lvery much metal has lescaped. The freezing of this vent is momentary only because when the nozzle drops to its lower position the heat of the nozzle will immediately melt the metal frozen in the vent so that it will be ready to operate correctly the next time the nozzle is seated and the pump pressure applied.

In order to illustrate the capacity of the vent it may be stated that under certain operating conditions the main bore of the vent was measurable in a few hundredths of an inch so that its cross sectional area would be about one-thousandth of a square inch. YV hen the plug 72 was put into place the segment opening left would have obviously an area of about one-third of that of the main bore: so that the area for the discharge is thus reduced by the plug to only a few tenthousandths of a square inch. This example is given not to limit the invention to the dimensions suggested so far as the vent is concerned because there are a variety of factors which would determine the size of the vent as previously suggested. It is given to show that the vent is in fact of extremely small size; it must not be so large in capacity that metal will run out of the mold cavity after the latter has been filled and the metal therein has started to congeal, which escape of metal would produce a product having bleeding feet, and yet it must be of sufficient size that practically all the air in the cavity will be expelled under the hydraulic pressure of the molten metal during the small period of time provided for producing a cast section and that it will not become clogged by small particles of dross.

l claim:

1. In a typographie casting machine, the combination of a mold comprising cavity forming walls, one of said walls being provided with an inlet port, the walls of which port form a nozzle seat, a nozzle provided with a bore and pump mechanism for introducing molten metal under pressinfe through said bore into said cavity, said nozzle being provided with a. vent leading fron'i said cavity to the exterior of the nozzle and being of such minute size as to prevent exit of metal except when under pressure exerted by the pump mechanism.

2. A nozzle for a typographie casting machine comprising avscrewthreaded end for attachment to a pump mechanism, opposite end being in the form of a truncated cone to seat against the nozzle seat of a typographie mold, said nozzle being provided with a conduit extending from said screwthreaded end to the opposite or mold end of the nozzle, said nozzle being also provided with a vent leading from said mold end of the nozzle to the exterior thereof and being of such minute size as to prevent exit of metal except when under pressure exerted by the pump mechanism.

ln a typographie casting machine, the combination of a mold comprising cavityforming walls, one of said walls being provided with an inlet port, the walls of which port torni a nozzle seat, a nozzle, and means for introducing molten metal into the cavity through the nozzle, said nozzle being pro vided with an axial conduit terminating at its inner end in a plurality oi' branches lor directing the metal angularly into diilerent parts or the mold cavity, and being also provided with a ventleading from said cavity to the exterior of the nozzle, said vent being or" such minute size as to prevent exit of metal except when under pressure exerted by the pump mechanism.

fi. A nozzle for a typographie casting ma.- chine comprising a screwthreaded end for attaclnnent to a pump mechanism, its opposite end being in the form of a truncated cone to seat against the nozzle seat of a typographie mold, said nozzle being provided with an axial conduit extending from said screwthreaded end into proximity to the opposite or mold end of the nozzle, and branch conduits leading angularly from the axial conduit through the mold end of the nozzle, said branch conduits being in the same axial plane, said nozzle being also provided with a vent leading from the mold end oi' the nozzle to the exterior thereof between the truncated cone seat portion and the screwthreaded end of the nozzle, said vent being of such minute size as to prevent exit of met-al exceptwhen under pressure exerted by the pump mechanism.

5. In a typographie casting machine, the combination of a mold comprising cavityforming walls, one of said Walls being provided with an inlet port, the walls of which port form a nozzle seat, a nozzle, and pump mechanism for introducing molten metal into the cavity through the nozzle, the latter being provided with an axial conduit in communication with the pump and extending into proximity to the mold cavity, and a plurality ot fan-shaped branch conduits connecting said axial conduit with said cavity, the nozzle being also provided with a vent leading :from said cavity at a point between the inlets of said i`an-shaped branch conduits to the exterior of the nozzle, said vent being of such minute size as to prevent exit of metal except when under pressure exerted by the pump mechanism.

6. A typographic casting machine comprising cavity-forming mold Walls, one of said walls being provided with a nozzle op-ening, a nozzle adapted to be seated in said opening and provided with a passage way through which molten metal may be in troduced into the mold cavity, a vent being provided in said nozzle, leading from said cavity to the exterior of the nozzle, said vent being' of such .minute size as to prevent exit of metal except when under pressure exerted by the pump mechanism.

7. A typographie casting machine comprising cavity-forming mold walls, one of said walls being pro-vided with a nozzle opening, a nozzle adapted to be seated in said opening and provided with a central bore and a plurality of fan-shaped bores connecting said central bore with said cavity, a relatively small vent`being provided in the nozzle, leading from said cavity at a point between the inlets of said fan-shaped bores to the exterior of the nozzle.

8. A casting machine comprising a mold for producing fused strip material for printing forms and comprising a mold base, type Llblocks, a mold blade and a matrix, said base being provided with a nozzle opening, and in combination therewith a nozzle adapted to be seated in said opening and provided with a central bore and two angular bores connecting said central bore with said cavity, one of said angular bores directing Lmetal against the end Wall of the last cast sect-ion to produce fusion therewith and the other being directed to fill the mold quickly, a relatively small vent being provided in the nozzle, leading from the cavity at a point between the inlets of said two angular bores to the exterior of the nozzle.

9. A mold for typographie strip material comprising a base provided with an opening, a removable nozzle plate supported on said base and provided with a nozzle opening in registry with said opening in the base, said nozzle opening having conical walls to 'form a nozzle seat, type blocks lon cated above said nozzle plate, a mold blade between the blocks, and means for adjusting said blocks relatively to each other to pro vide a proper sliding fit for the mold blade.

l0. A typographie casting machine comprising a pump and mold mechanism for producing printers strip material and deliv ering it in finished condition, and in combination therewith, a friction device including an abutment contacting with one side of said finished strip material and a plunger contacting with the opposite side thereof, a spring for yieldably forcing said plunger against the material, and means for controlling the contacting pressure of said plunger against the material whereby accidental mov-ement of the material due to the hydraulic pressure produced by the pump is prevented.

ll. A mold for typographie strip material comprising a baseprovided with a nozzle opening, type blocks mounted on said base, matrix blocks mounted on said type blocks, a matrix guided by said matrix blocks and adapted to seat upon said type blocks and a mold blade slidable between the type blocks and having a :forwardly extending end poradapted to seat upon said type blocks, a mold tion guided between said matrix blocks. blade slidable between the type blocks and 12. A lnold for typographie strip material a inold blade holder slidably guided between 10 comprising a base provided with a nozzle said matrix blocks and detaehably secured opening, type blocks mounted on said base, to said mold blade to cause reciprocation inartix blocks mounted on said type blocks, of the latter.

a. matrix guided by said lnatriX blocks and MAURITZ C. INDAHL. 

